package top.zackyoung.springboot.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;

import java.util.ArrayList;
import java.util.List;

/**
 * @author ZackYoung
 * @version 1.0
 * @description
 * @date 2021/5/16 11:35
 */
@Configuration
public class FastjsonConfig {
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        // 1.定义一个converters转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 2.添加fastjson的配置信息，比如: 是否需要格式化返回的json数据
        com.alibaba.fastjson.support.config.FastJsonConfig fastJsonConfig = new com.alibaba.fastjson.support.config.FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat, SerializerFeature.WriteMapNullValue, SerializerFeature.DisableCircularReferenceDetect);
        // 中文乱码解决方案
        List<MediaType> mediaTypes = new ArrayList<>();
        // 设定json格式且编码为UTF-8
        mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastConverter.setSupportedMediaTypes(mediaTypes);
        // 3.在converter中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);
        // 4.将converter赋值给HttpMessageConverter
        // 5.返回HttpMessageConverters对象

        //BigDecimal格式化
        //设置我们自定义的 BigDecimalValueFilter
        fastJsonConfig.setSerializeFilters(new BigDecimalValueFilter());

        return new HttpMessageConverters((HttpMessageConverter<?>) fastConverter);
    }
}

